2022
DOI: 10.1051/0004-6361/202038643
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Development and application of metamaterial-based half-wave plates for the NIKA and NIKA2 polarimeters

Abstract: Context. Large field-of-view imaging and polarimetry instruments operating at millimetre and sub-millimetre wavelengths are fundamental tools to understand the role of magnetic fields in channelling filament material into prestellar cores, providing unique insight in the physics of galactic star-forming regions. Among other topics, at extra-galactic scales, polarisation observations of Active Galactic Nuclei (AGNs) will allow us to constrain the possible physical conditions of the emitting plasma from the jets… Show more

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Cited by 11 publications
(15 citation statements)
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“…We have adopted simulated frequency profiles for the efficiency h and the non-ideal phase shift β in the MFT frequency bands, provided by finite-element simulations of the MHFT LiteBIRD MHWPs. The waveplate designs are based on previous developments and realisations (Pisano et al 2020). The profiles for ζ have always been fixed to a realistic (Pisano et al 2012) level of 0.01 in all the bands, as this parameter was not included in the suite of simulations at our disposal.…”
Section: Discussionmentioning
confidence: 99%
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“…We have adopted simulated frequency profiles for the efficiency h and the non-ideal phase shift β in the MFT frequency bands, provided by finite-element simulations of the MHFT LiteBIRD MHWPs. The waveplate designs are based on previous developments and realisations (Pisano et al 2020). The profiles for ζ have always been fixed to a realistic (Pisano et al 2012) level of 0.01 in all the bands, as this parameter was not included in the suite of simulations at our disposal.…”
Section: Discussionmentioning
confidence: 99%
“…The waveplate designs are based on previous developments and realisations (Pisano et al 2020). The profiles for ζ have always been fixed to a realistic (Pisano et al 2012) level of 0.01 in all the bands, as this parameter was not included in the suite of simulations at our disposal. In the LFT (also not included in the simulation suite) and HFT bands , we have used constant profiles also for h and β.…”
Section: Discussionmentioning
confidence: 99%
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“…First of all, we allowed for HWP matrix elements to be frequency-dependent: we assumed a specific LiteBIRD MHWP design with certain frequency pro-files within each band. The MHWP performance was computed using realistic models developed for previous waveplate applications (Pisano et al 2022).…”
Section: Multi-frequency Casementioning
confidence: 99%